A whole new world -- and a brand new Flash -- are coming in "The Flash" Season 2.

The first season ended on quite a cliffhanger, with our hero Barry Allen (Grant Gustin) taking a super-speed leap into a wormhole to stop it from destroying Central City. What happened after that? Fans will find out when the action resumes Tuesday, October 6 at 8 p.m. ET on The CW. Here are five things you need to know about the new season.

1. There's a Time Jump Into the Premiere

The first episode of Season 2, "The Man Who Saved Central City," picks up "months" after the Singularity attacked. We'll see Barry still struggling to forgive himself for Eddie's death (side note: Is Eddie really gone?) and concerned about putting his friends in danger. So he's pushing everyone away and is choosing to just protect the city on his own.

However, when a meta-human named Atom Smasher (Adam Copeland) attacks the city, Iris West (Candice Patton) tells Barry that he needs to let his friends help him. Also in the premiere, Cisco (Carlos Valdes) helps Joe (Jesse L. Martin) with his Meta Task Force.

2. Iris has a Bigger Role

Expect to see more of Iris this season, after Barry kept her in the dark last year.

Executive producer Andrew Kreisberg told MTV News that Iris is the one who brings the team together in the Season 2 premiere, and we'll also see more of her relationship with her father.

"Iris has an extremely strong story this year, dealing with the West family and her dad," Kreisberg said. "It's absolutely amazing — and we're really excited for people to see what happens to her this year."

3. Another Flash Is Coming

Season 2, Episode 2 is called "Flash of Two Worlds," and it will introduce the DC Comics character Jay Garrick (Teddy Sears), the original fastest man alive.

This mysterious guy from Earth-2 will appear at S.T.A.R. Labs with a warning about an evil speedster named Zoom, who is set on destroying The Flash. "[Garrick has] never been portrayed to our knowledge in live action," Kreisberg said at Comic-Con. "Now that we've established our Flash, we thought it was interesting to bring on the original Flash and create a brand new relationship for Barry to have."

4. Prepare to Welcome Many New Faces

Executive producer Greg Berlanti said they'll be introducing several characters from Earth-2 this year, beyond Garrick. Also, actor Michael Ironside will be playing Lewis Snart, the estranged, abusive father of villains Leonard Snart/Captain Cold (Wentworth Miller) and Lisa Snart/Golden Glider (Peyton List).

According to The Hollywood Reporter, Ironside will be in Season 2, Episode 3, "Family of Rogues." Entertainment Weekly listed more of the fresh faces, including Wally West (Keiynan Lonsdale), Patty Spivot (Shantel VanSanten), and Jesse Quick (Violett Beane) as new allies.

5. Expect a WTF Moment in the Premiere

Just as a teaser/warning, TVLine got to see the Season 2 premiere in advance and shared a brief review. Overall, they said "it is quite satisfying," but there were some caveats. As they wrote:

You will (eventually) see exactly how the 'singularity' was dealt with, and why that seeming victory has, sadly, splintered Team Flash in multiple directions. A highly entertaining bromance gets a big boost, one could argue that the foundation for Caitlin's fated alter ego is laid, and there is a montage toward the end that is simply wonderful and loaded with heart. All that said, I'd be lying if I didn't acknowledge a major 'What the heck?' moment in the penultimate scene, a zag that actually had me yelling, 'What the heck?' (or saltier words to that effect) at my laptop screen."

Sounds like fans may have a strong not-so-positive reaction to this particular Episode 1 scene, but doesn't that just make you even more curious to see it?

"The Flash" Season 2 starts Tuesday, October 6 from 8 to 9 p.m. ET on The CW.